i have 2009 13" notebook , go pro says i need to upgrade graphics card. need help

i am using my notebook with studio2 for my gopro to try and make a movie. i lose the sound when i go from step 1 to step 2. in searching for the answer i was told to upgrade my graphics card on my notebook. i have a nvida geforce 9400m 256mb in it now , how do i upgrade it?